Preformed the spring maintenance. Found the condensor wires to be chewed through and the transformer to be popped while testing the system. Temp fixed the wires and replaced the transformer. This is due to the age of the unit for the fuse to not be popped. The compressor is making a loud noise intermittently and is a sign that it is nearing failure. The furnace has a bend due to age and the unit needs a hung rite added into it. Customer mentioned the evap coil is producing a dirty sock smell, recommend a reme halo and duct cleaning, with a coil cleaning to fix this. With all the fore mentioned issusrs recommend looking towards replacing soon. Customer is going to reach back out soon if they would like an estimate.